Subpages automatically create an entry in the navigation menu of the site. In addition, external and internal links can also be added as a subpage.
To add a new subpage:
Click on the + Subpage button
Type in the subpage title that you want
Click Save
To add an external or internal linked subpage:
Click on the drop-down arrow next to the + Subpage button.
Select the appropriate option from the list: External Link, Internal Link or Paste Subpage.
For External Link: Just enter the External Link title and the website address. You also have the option to either open the link in a new tab or not. To finish, just click on the Create External Link
For Internal Link: Enter the Internal Link Title, then click on the drop-down for Destination Subpage. Choose the subpage and tile where you want to place the link then click Create Internal Link to finish.
Paste Subpage: Select this option if you have copied a subpage instead.